Basic Information Transfer Methods
Basic Information Transfer Methods
Table of Contents
Introduction
This assignment is to explain the difference between Analog Transmission and Digital Transmission, using both text and diagrams to explain both the mechanisms and the +/_ aspects. Also list the advantages and disadvantages of each technique and current uses for each.
Purpose and goals
The purpose of the assignment is to learn the basic information about Analog and Digital transmission, be familiar with both the mechanisms and the +/- aspects, understand the advantages and disadvantages of the technique and current uses for them.
Procedures
Analog Transmission
Analog (or analogue) transmission is a transmission method of conveying voice, data, image, signal or video information using a continuous signal which varies in amplitude, phase, or some other property in proportion to that of a variable. It could be the transfer of an analog source signal, using an analog modulation method such as frequency modulation (FM) or amplitude modulation (AM), or no modulation at all. (Wikipedia)
Until the 1950’s all voice communication was analog as invented by Bell and developed within the Bell system.
Analog transmission is particularly susceptible to the above factors, this lead AT&T to develop a digital technique (as used by Western Union in the telegraph) for voice communication.
data continuous (e.g., voice)
Signal
continuous electromagnetic waves
Used mainly for transmitting data across a network transmission Transmission of analog signals without regards to their content (the data may be analog or binary). The signals become weaker (attenuated) with the distance. Amplifiers may be used to strengthen the signals, but as side effect they also boost the noise. This might not be a problem for analog data, such as voice, but is a problem for digital data
Digital Transmission
Digital Transmission, Data Transmission, or Digital Communications is the
Table of Contents
Introduction
This assignment is to explain the difference between Analog Transmission and Digital Transmission, using both text and diagrams to explain both the mechanisms and the +/_ aspects. Also list the advantages and disadvantages of each technique and current uses for each.
Purpose and goals
The purpose of the assignment is to learn the basic information about Analog and Digital transmission, be familiar with both the mechanisms and the +/- aspects, understand the advantages and disadvantages of the technique and current uses for them.
Procedures
Analog Transmission
Analog (or analogue) transmission is a transmission method of conveying voice, data, image, signal or video information using a continuous signal which varies in amplitude, phase, or some other property in proportion to that of a variable. It could be the transfer of an analog source signal, using an analog modulation method such as frequency modulation (FM) or amplitude modulation (AM), or no modulation at all. (Wikipedia)
Until the 1950’s all voice communication was analog as invented by Bell and developed within the Bell system.
Analog transmission is particularly susceptible to the above factors, this lead AT&T to develop a digital technique (as used by Western Union in the telegraph) for voice communication.
data continuous (e.g., voice)
Signal
continuous electromagnetic waves
Used mainly for transmitting data across a network transmission Transmission of analog signals without regards to their content (the data may be analog or binary). The signals become weaker (attenuated) with the distance. Amplifiers may be used to strengthen the signals, but as side effect they also boost the noise. This might not be a problem for analog data, such as voice, but is a problem for digital data
Digital Transmission
Digital Transmission, Data Transmission, or Digital Communications is the